After upgrading to HAOS 16.3 yesterday, it seems that the host network becomes very unstable. The whole Home Assistant including all the addons get disconnected from LAN regularly, affecting many sensors and automations.
I have a continuous monitor that pings the Home Assistant host by IP address every minute, and its record shows that in certain period of time, the host becomes unreachable every few minutes and then back.
It’s unlikely an issue of the local network because all other devices connected to the network don’t experience similar issue. And it also just starts happening on Home Assistant from yesterday, coincide the upgrade of HAOS.
In the Host log, I can see repeated at quite a high frequency, but doesn’t seem to necessarily follow when the issue happens strictly.
2025-11-07 00:30:54.134 homeassistant kernel: r8169 0000:01:00.0 enp1s0: Link is Down
2025-11-07 00:30:56.682 homeassistant kernel: r8169 0000:01:00.0 enp1s0: Link is Up - 1Gbps/Full - flow control rx/tx
2025-11-07 00:30:56.684 homeassistant NetworkManager[445]: [1762475456.6831] device (enp1s0): carrier: link connected
I did try connect monitor and keyboard to the device, and the command line inside still works, but I’m not sure what I can do there to help diagnose.
Not sure if it helps, the device is Dell Wyse 5070, an x86 device, not Raspberry Pi or alike. I’ve been running Home Assistant on this device since June without any issue until yesterday.
Any suggestion on what I could try and what might be the issue?